Tri-D Chess ( aka Tri-Dimensional Chess ) is a Chess variant which can be seen in many Star Trek TV episodes and movies, starting with the original series and proceeding in updated forms throughout the subsequent movies and spinoff series.

3D chess from Star TrekThe original rules for three dimensional chess.http://www.chessvariants.com/3d.dir/startrek.html

bag's Star Trek Page... original rules for Star Trek's Tri-D Chess were first published in the October ... online source for information on the latest revision of his Tri-D chess rules. ...http://www.grigor.org/startrek.htm